asp.net - JqueryMobile Asp:Dropdownlist AutoPostback

Question

我的移动 aspx 页面中有一个 asp:DropDownList 元素。

<asp:DropDownList ID="formulationSelect" AutoPostBack ="true" EnableViewState =" true" runat="server"></asp:DropDownList>
            <asp:DropDownList ID="languageSelect" AutoPostBack ="true"   EnableViewState =" true" runat="server"></asp:DropDownList>

我在我的普通 aspx 页面上有完全相同的代码（这很好用）。I am wanting it so that when a different value is selected it performs a postback (no method is needing to be fired) but when it postbacks, the code then uses the new selected value in the dropdown box to load new objects.

问题是当我选择不执行回发的值时，我收到错误：

Uncaught TypeError: Cannot set property 'value' of undefined
__doPostBack
(anonymous function)